Fame
Even if you do work with Dr. Dre, to the American public you're just a name on the CD jacket. In this field you're very likely to be close to the fame, but audio engineers are experts at being heard and not seen. As crucial as these workers are to the success of the project, they are rarely the stars of the show. You might be able to make some famous friends in this business, though. For the most part though, audio engineers tend to be a little underappreciated for their work.